Coring device for cutting holes through a structure

A coring unit for cutting a core into a structure, comprising:

• a clamping arrangement for releasably attaching the coring unit to the structure;
• a bit comprising an elongated tubular body having a cutting surface at a first circular end of the elongated tubular body for cutting the core;
• a rotary actuator to rotate the bit;
• and
• a linear actuator to linearly translate the bit such that the bit is rotated and moved with respect to the clamping arrangement to advance and retreat the bit through the structure to cut the core from the structure;
• wherein the rotatory actuator is adapted to removably receive and retain a second circular end of the elongated tubular body of the bit opposite the first circular end and the cutting surface of the elongated tubular body, a portion of the elongated tubular body protruding from the rotary actuator for cutting the core from the structure;
• and
• wherein the elongated tubular body has an open hollow interior defining a passage for receiving and passing the core through the rotary actuator after the core is cut.